Input set
5 fields
Joint length / Joint width
Estimate fire-stopping mastic cartridges from joint length, width, depth and cartridge yield. Use the inputs below to estimate materials, quantities, labour allowances, site checks or planning figures before creating quotes, RAMS, purchase lists or project records.
Inputs
Result area
Cartridges required
7 cartridges
Rounded cartridge count including waste.
Joint volume
1,920 ml
Estimated filled joint volume before waste.
Input set
Joint length / Joint width
Outputs
Cartridges required / Joint volume
Estimate status
Rounded cartridge count including waste.
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Fire Collar Quantity Calculator
Formula notes
Estimate fire-stopping mastic cartridges from joint length, width, depth and cartridge yield. The calculation uses the visible inputs, applies allowances where shown, and rounds ordering-style quantities up where practical.
Worked example
Example: enter the default values above, review the cartridges required, then adjust the allowance to suit supplier data and site conditions.
Move from estimate to record
Copy a portable summary or print this page to PDF, then carry the checked figure into a controlled project workflow.
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FAQ
No. It is an estimating prompt only. Check measurements, supplier specifications, product data, site conditions and competent advice before ordering materials or starting work.
Public calculator results are for lead-generation and planning today. App calculators can later save results to jobs, quotes, RAMS, stock and purchase orders.
Fire Stopping Mastic Calculator gives the starting number. Zektrx helps turn it into job planning, material control and report-ready evidence for the trade team.
Plan
Fire stopping
Materials
Cartridges required
Report
Fire stopping

Plan
Trade estimates are more useful when they create a route into owners, dates, readiness checks and delivery context.
Trade calculator
Fire stopping

Materials
Calculator outputs can support material checks, reservations, purchase notes and job-linked stock evidence.
Trade calculator
Cartridges required

Report
Saved numbers and linked records help managers review estimates, evidence and close-out without rebuilding context.
Trade calculator
Fire stopping
Trade calculator results are more useful when they feed the work package: scope checks, material planning and the briefing that keeps delivery aligned.

Check the scope
Use the estimate to confirm measurements, assumptions, labour and site readiness.

Prepare materials
Move quantities into stock checks, purchase notes and job-linked material records.

Brief the work
Share the assumptions, limits and controls with the team before the job starts.